From: Mark Brown <broonie@kernel.org> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org> Cc: "Alexander Viro" <viro@zeniv.linux.org.uk>, "Paul Elliott" <paul.elliott@arm.com>, "Peter Zijlstra" <peterz@infradead.org>, "Yu-cheng Yu" <yu-cheng.yu@intel.com>, "Amit Kachhap" <amit.kachhap@arm.com>, "Vincenzo Frascino" <vincenzo.frascino@arm.com>, "Marc Zyngier" <maz@kernel.org>, "Eugene Syromiatnikov" <esyr@redhat.com>, "Szabolcs Nagy" <szabolcs.nagy@arm.com>, "H . J . Lu " <hjl.tools@gmail.com>, "Andrew Jones" <drjones@redhat.com>, "Kees Cook" <keescook@chromium.org>, "Arnd Bergmann" <arnd@arndb.de>, "Jann Horn" <jannh@google.com>, "Richard Henderson" <richard.henderson@linaro.org>, "Kristina Martšenko" <kristina.martsenko@arm.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Florian Weimer" <fweimer@redhat.com>, "Sudakshina Das" <sudi.das@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Mark Brown" <broonie@kernel.org> Subject: [PATCH v6 11/11] arm64: mm: Display guarded pages in ptdump Date: Wed, 12 Feb 2020 19:29:06 +0000 Message-ID: <20200212192906.53366-12-broonie@kernel.org> (raw) In-Reply-To: <20200212192906.53366-1-broonie@kernel.org> v8.5-BTI introduces the GP field in stage 1 translation tables which indicates that blocks and pages with it set are guarded pages for which branch target identification checks should be performed. Decode this when dumping the page tables to aid debugging. Signed-off-by: Mark Brown <broonie@kernel.org> --- arch/arm64/mm/dump.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 860c00ec8bd3..78163b7a7dde 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -145,6 +145,11 @@ static const struct prot_bits pte_bits[] = { .val = PTE_UXN, .set = "UXN", .clear = " ", + }, { + .mask = PTE_GP, + .val = PTE_GP, + .set = "GP", + .clear = " ", }, { .mask = PTE_ATTRINDX_MASK, .val = PTE_ATTRINDX(MT_DEVICE_nGnRnE), -- 2.20.1
prev parent reply index Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-12 19:28 [PATCH v6 00/11] arm64: Branch Target Identification support Mark Brown 2020-02-12 19:28 ` [PATCH v6 01/11] ELF: UAPI and Kconfig additions for ELF program properties Mark Brown 2020-02-26 5:49 ` Kees Cook 2020-02-26 11:20 ` Mark Brown 2020-02-12 19:28 ` [PATCH v6 02/11] ELF: Add ELF program property parsing support Mark Brown 2020-02-12 19:28 ` [PATCH v6 03/11] arm64: Basic Branch Target Identification support Mark Brown 2020-02-12 19:28 ` [PATCH v6 04/11] elf: Allow arch to tweak initial mmap prot flags Mark Brown 2020-02-12 19:29 ` [PATCH v6 05/11] arm64: elf: Enable BTI at exec based on ELF program properties Mark Brown 2020-02-25 13:28 ` Amit Kachhap 2020-02-25 17:27 ` Mark Brown 2020-02-26 5:47 ` Kees Cook 2020-02-12 19:29 ` [PATCH v6 06/11] arm64: BTI: Decode BTYPE bits when printing PSTATE Mark Brown 2020-02-12 19:29 ` [PATCH v6 07/11] arm64: unify native/compat instruction skipping Mark Brown 2020-02-12 19:29 ` [PATCH v6 08/11] arm64: traps: Shuffle code to eliminate forward declarations Mark Brown 2020-02-12 19:29 ` [PATCH v6 09/11] arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown 2020-02-12 19:29 ` [PATCH v6 10/11] KVM: " Mark Brown 2020-02-15 11:56 ` Marc Zyngier 2020-02-12 19:29 ` Mark Brown [this message]
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